Question

(3-√2)(5+√2)-(√2-1)²

Answer 1

15+3√2-5√2-2-(2-2√2+1)
15+3√2-5√2-2-3+2√2
10

Answer 2

(3-√2)(5+√2)-(√2-1)²
15+3√2-5√2-2-(2-2√2+1)
15+3√2-5√2-2-(3-2√2)
15+3√2-5√2-2-3+2√2
10+0=10
Ответ:10